pata_piccolo: Driver for old Toshiba chipsets

We were never able to get docs for this out of Toshiba for years. Dave
Barnes produced a NetBSD driver however and from that we can fill in the
needed tables.

As we correct the PCI identifiers a bit also update the old ide generic driver
at the same time so it stays compiling.

Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>

1 files changed, 140 insertions, 0 deletions

diff --git a/drivers/ata/pata_piccolo.c b/drivers/ata/pata_piccolo.c
new file mode 100644
index 000000000000..bfe0180f3efa
--- /dev/null
+++ b/drivers/ata/pata_piccolo.c
@@ -0,0 +1,140 @@
+/*
+ *  pata_piccolo.c - Toshiba Piccolo PATA/SATA controller driver.
+ *
+ *  This is basically an update to ata_generic.c to add Toshiba Piccolo support
+ *  then split out to keep ata_generic "clean".
+ *
+ *  Copyright 2005 Red Hat Inc, all rights reserved.
+ *
+ *  Elements from ide/pci/generic.c
+ *          Copyright (C) 2001-2002     Andre Hedrick <andre@linux-ide.org>
+ *          Portions (C) Copyright 2002  Red Hat Inc <alan@redhat.com>
+ *
+ *  May be copied or modified under the terms of the GNU General Public License
+ *
+ *  The timing data tables/programming info are courtesy of the NetBSD driver
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/pci.h>
+#include <linux/init.h>
+#include <linux/blkdev.h>
+#include <linux/delay.h>
+#include <scsi/scsi_host.h>
+#include <linux/libata.h>
+
+#define DRV_NAME "pata_piccolo"
+#define DRV_VERSION "0.0.1"
+
+
+
+static void tosh_set_piomode(struct ata_port *ap, struct ata_device *adev)
+{
+        static const u16 pio[6] = {     /* For reg 0x50 low word & E088 */
+                0x0566, 0x0433, 0x0311, 0x0201, 0x0200, 0x0100
+        };
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u16 conf;
+        pci_read_config_word(pdev, 0x50, &conf);
+        conf &= 0xE088;
+        conf |= pio[adev->pio_mode - XFER_PIO_0];
+        pci_write_config_word(pdev, 0x50, conf);
+}
+
+static void tosh_set_dmamode(struct ata_port *ap, struct ata_device *adev)
+{
+        struct pci_dev *pdev = to_pci_dev(ap->host->dev);
+        u32 conf;
+        pci_read_config_dword(pdev, 0x5C, &conf);
+        conf &= 0x78FFE088;     /* Keep the other bits */
+        if (adev->dma_mode >= XFER_UDMA_0) {
+                int udma = adev->dma_mode - XFER_UDMA_0;
+                conf |= 0x80000000;
+                conf |= (udma + 2) << 28;
+                conf |= (2 - udma) * 0x111;     /* spread into three nibbles */
+        } else {
+                static const u32 mwdma[4] = {
+                        0x0655, 0x0200, 0x0200, 0x0100
+                };
+                conf |= mwdma[adev->dma_mode - XFER_MW_DMA_0];
+        }
+        pci_write_config_dword(pdev, 0x5C, conf);
+}
+
+
+static struct scsi_host_template tosh_sht = {
+        ATA_BMDMA_SHT(DRV_NAME),
+};
+
+static struct ata_port_operations tosh_port_ops = {
+        .inherits       = &ata_bmdma_port_ops,
+        .cable_detect   = ata_cable_unknown,
+        .set_piomode    = tosh_set_piomode,
+        .set_dmamode    = tosh_set_dmamode
+};
+
+/**
+ *      ata_tosh_init           -       attach generic IDE
+ *      @dev: PCI device found
+ *      @id: match entry
+ *
+ *      Called each time a matching IDE interface is found. We check if the
+ *      interface is one we wish to claim and if so we perform any chip
+ *      specific hacks then let the ATA layer do the heavy lifting.
+ */
+
+static int ata_tosh_init_one(struct pci_dev *dev, const struct pci_device_id *id)
+{
+        static const struct ata_port_info info = {
+                .flags = ATA_FLAG_SLAVE_POSS,
+                .pio_mask = ATA_PIO5,
+                .mwdma_mask = ATA_MWDMA2,
+                .udma_mask = ATA_UDMA2,
+                .port_ops = &tosh_port_ops
+        };
+        const struct ata_port_info *ppi[] = { &info, &ata_dummy_port_info };
+        /* Just one port for the moment */
+        return ata_pci_sff_init_one(dev, ppi, &tosh_sht, NULL);
+}
+
+static struct pci_device_id ata_tosh[] = {
+        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_1), },
+        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_2),  },
+        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_3),  },
+        { PCI_DEVICE(PCI_VENDOR_ID_TOSHIBA,PCI_DEVICE_ID_TOSHIBA_PICCOLO_5),  },
+        { 0, },
+};
+
+static struct pci_driver ata_tosh_pci_driver = {
+        .name           = DRV_NAME,
+        .id_table       = ata_tosh,
+        .probe          = ata_tosh_init_one,
+        .remove         = ata_pci_remove_one,
+#ifdef CONFIG_PM
+        .suspend        = ata_pci_device_suspend,
+        .resume         = ata_pci_device_resume,
+#endif
+};
+
+static int __init ata_tosh_init(void)
+{
+        return pci_register_driver(&ata_tosh_pci_driver);
+}
+
+
+static void __exit ata_tosh_exit(void)
+{
+        pci_unregister_driver(&ata_tosh_pci_driver);
+}
+
+
+MODULE_AUTHOR("Alan Cox");
+MODULE_DESCRIPTION("Low level driver for Toshiba Piccolo ATA");
+MODULE_LICENSE("GPL");
+MODULE_DEVICE_TABLE(pci, ata_tosh);
+MODULE_VERSION(DRV_VERSION);
+
+module_init(ata_tosh_init);
+module_exit(ata_tosh_exit);
+